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On one particularly hideous day 66 million years ago, Earth burned. A city-sized asteroid struck off the coast of Mexico’s Yucatan Peninsula and pushed the planetary reset button, wiping out species from plankton to plesiosaurs.
Some 75 percent of all life — including every land animal larger than 55 pounds — went extinct. The calamity changed the course of evolution.read more

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No mass extinction on Earth has been so tightly linked to an impact as the Chicxulub Crater which cuts across the northern Yucatan peninsula in Mexico in a mighty arc 170 kilometers (105 miles) across. The crater's size implies an.....

No mass extinction on Earth has been so tightly linked to an impact as the Chicxulub Crater which cuts across the northern Yucatan peninsula in Mexico in a mighty arc 170 kilometers (105 miles) across. The crater's size implies an.....

The prehistoric Chicxulub crater left by an asteroid collision in Mexico's Yucatan Peninsula could yield clues about what Mars was like billions of years ago, according to NASA planetary geologist Adriana Ocampo, who is studying bur...

The prehistoric Chicxulub crater left by an asteroid collision in Mexico's Yucatan Peninsula could yield clues about what Mars was like billions of years ago, according to NASA planetary geologist Adriana Ocampo, an expert about wha...